Do stuff more efficiently and make fewer mistakes by acting like you are teaching someone how to do it. For example, if I'm painting my living room, I imagine I'm showing someone else the right and wrong things to: preventing drips and bubbles, how to prepare the room, etc. This helps me to be less sloppy when I'm doing things because when you teach someone how to do something you want them to do it right (and you tend to move a bit slower). If you pretend, in your mind, that you're teaching someone then you, too, will be more likely to do it right and make fewer mistakes.